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faltersainse [42]
4 years ago
5

Why are most modern constellations composed of faint stars or located in the southern hemisphere?

Geography
1 answer:
vaieri [72.5K]4 years ago
3 0
Astronomers from areas in the northern latitudes developed different constellations and maps of the sky than their southern counterparts, as faint stars weren't visible to them. In the 18th and 19th centuries, there weren't constellations in the southern hemispheres, so astronomers, instead, invented them.
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How dud thanksgiving become an official holiday?
bija089 [108]
When the settlers came to the United states, the native Americans helped them. When winter was over, they wanted to celebrate surviving through winter. The settlers invited the Native Americans and they had a big feast together.
3 0
4 years ago
Order the steps involved in hydrofracking. ltems (4 items) Drag and drop into the appropriate area) Items in order Start (hole d
Gre4nikov [31]

Answer:

First step- Statement 1

Second step- Statement 2

Third step- Statement 3

Fourth step- Statement 4

Explanation:

The steps that are involved in the process of hydro-fracking are s follows-

1) Well drilling-  A well is initially drilled vertically from the surface into the ground until it reaches the more permeable layers such as the shale layers.

2) Pumping at high pressure in the hole- After drilling a well, the high pressured fracking fluid is pumped into the well using a tank (pumping tank). This fracking fluid id made up of sand, some amount of water as well as various types of chemical are present in it.

3) Cracks at the shale rock- The shale rock has the internal pressure that exerts the fluid to come to the surface.

4) Proppants opens up the cracks- The proppants helps in keeping the cracks open after the retreatment of water.

5) Natural gas obtained- Since these shale gases are now able to flow out of the shale layers, the gases are extracted through the well and stored in the storage tanks.

Thus, the given statements are being arranged in order.

6 0
3 years ago
3. An undisturbed soil sample has the following data (Source - Lu & Evett): 1. Void ratio = 0.78 2. Water content -12% 3. Sp
irga5000 [103]

Answer:

Wet unit weight = 1.94 g/cc

Dry unit weight =1.05 g/cc

density of saturation = 0.41

porosity = 0.43

Explanation:

given data

Void ratio = 0.78

Water content -12%

Specific gravity of solids - 2.68

to find out

Wet unit weight and Dry unit weight and Degree of saturation and Porosity

solution

we know that Wet unit weight formula is

Wet unit weight = \frac{Gs + e}{1+e} density of water

here Gs is specific gravity of soild and e is void ratio and density of water is 1

so Wet unit weight = \frac{2.68 + 0.78}{1+0.78}

Wet unit weight = 1.94 g/cc

and

Dry unit weight = \frac{Gs - e}{1+e} density of water

Dry unit weight = \frac{2.65 - 0.78}{1+0.78}

Dry unit weight =1.05 g/cc

and

density of saturation is

density of saturation = Wc × \frac{Gs}{e}

her Wc is water content

so density of saturation = 0.12 × \frac{2.68}{0.78}

density of saturation = 0.41

and

porosity is

porosity = \frac{e}{1+e}  

porosity =  \frac{0.78}{1+0.78}  

porosity = 0.43

3 0
3 years ago
What are three ways that plants can help animals? What is a way that animals can help plants?
inessss [21]
Some animals eat plants, they provide oxygen, and they can provide shelter. animals provide plants with carbon dioxide, they assist in seed dispersal, and decompose dead material back into fertile soils.
5 0
3 years ago
Ano ang kahulugan ng humanidades?​
PSYCHO15rus [73]

Explanation:

Humanities are academic disciplines that study aspects of human society and culture. In the Renaissance, the term contrasted with divinity and referred to what is now called classics, the main area of secular study in universities at the time.

7 0
3 years ago
Read 2 more answers
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